Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (3): 1333-1340.doi: 10.11843/j.issn.0366-6964.2023.03.043

• RESEARCH NOTES • Previous Articles     Next Articles

Detection of Bovine Adenovirus Type 3 Infection Status and Its Fiber Shaft Gene

HE Shufan1, ZOU Yuantong1, HUANG Zhilan1, LI Qian1, JIANGCUO Wengxi1, YUE Hua1,2, TANG Cheng1,2, LIU Jie1,2*   

  1. 1. College of Animal & Veterinary Sciences, Southwest Minzu University, Chengdu 610041, China;
    2. Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Chengdu 610041, China
  • Received:2022-07-25 Online:2023-03-23 Published:2023-03-21

Abstract: This study was conducted to investigate the infection status of BAdV-3 by TB Green Real-time PCR on 140 nasal swab samples of sick cattle characterized by runny nose, fever, cough and dyspnea from 9 large-scale cattle farms in 6 provinces in China (Sichuan Province, Shanxi Province, Henan Province, Hebei Province, Jiangsu Province and Inner Mongolia Autonomous Region), and the positive samples were tested for the fiber shaft gene. The results showed that the BAdV-3 positive rate was 36.4% among 140 samples, and BAdV-3 was detected in all provinces except for Hebei Province, with the highest detection rates in Sichuan and Henan Provinces, reaching 82.9% (29/35) and 83.3% (10/12), respectively. Among them, the traditional types accounted for 80.4% of the total positive ratio, and the strain with the deletion of the fiber shaft region accounted for 19.6% of the total positive samples. The position and number of deletions were consistent, with 237 consecutive base pairs missing in the shaft region, and the deletion type was only detected in Sichuan and Henan Provinces, with a detection rate of 24.1% (7/29) and 30% (3/10), and a field group positive rate of 100% (2/2) and 100% (1/1), respectively. The results indicate that BAdV-3 has a wide distribution in cattle farms in China, and the current epidemic virus is mainly the traditional strain of BAdV-3. The fiber shaft gene deletion strain has a unique geographical distribution in China and is mainly prevalent in Sichuan and Henan Provinces.

Key words: bovine adenovirus type 3, epidemiological investigation, real-time PCR, genetics and evolution, the gene deletion in the fiber shaft region

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